• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

TR6 Ballancing the connecting rods and pistons. Am I lucky?

Got_All_4

Luke Skywalker
Country flag
Offline
Hope to be assembling the engine in a few weeks. Pulled out my connecting rods and pistons to balance this weekend. Used my digital scale and when I weighed everything they were exactly the same. Weighed the connecting rods with and without the wrist pins and each individual pistons. A couple of he connecting rods flickered which suggests they were on the edge but eventually settled at the same measurement as the others. I heard that TR6 engines were well balanced from the factor but whats the chances of that happening. My TR250 was way off and 18 years ago when I did it and I have a different scale now but does not carry out in tenths beyond grahams like my old one. What could I be ding wrong?
 

CJD

Yoda
Country flag
Offline
I think most factories shoot for +- 1 gram. I shoot for within 1/10th gram. If anything had been replaced from original, then it sounds like someone already went through your engine. If it is all factory, then it could just be the factory job.
 

LarryK

Yoda
Gold
Country flag
Offline
In the factory someone scaled rotating parts and organized the ones closest in weight together. Then upon needing the part it was grouped by weight for the pull to put in the engine. Even Jags were done this way, not balanced, just paired close. Racing in the 50s and 60s only showed fuel and air improvement and tolerance in clearances not balancing, used as stock as possible.
 
OP
Got_All_4

Got_All_4

Luke Skywalker
Country flag
Offline
Don't think anyone has been through the engine before. There would be grind marks and other signs of work. Don't think there are ways to hide that and what fore. LarryK's seems more possible.
 
OP
Got_All_4

Got_All_4

Luke Skywalker
Country flag
Offline
That even makes more since now because I noticed that the pistons and rods weren't numbered. I had to make marks on them to ensure they went back in the correct hole.
 
Similar threads
Thread starter Title Forum Replies Date
Popeye General TR Connecting to Lucas switch grub screws? Triumph 5
D Separating the piston from the connecting rod. Spridgets 9
KVH General Tech Connecting Rod Bearings Triumph 8
B For Sale Connecting Rod Bearings Austin Healey Classifieds 0
71TR6 Set of 4 TR2/3/4 Connecting Rods Triumph Classifieds 0
R TR4/4A CP-Carrillo or Pauter Connecting Rods Triumph 2
R Connecting Rod Big End Specification Austin Healey 4
BN6_2197 Removing connecting link between shock absorber and rear axle Austin Healey 4
M TR2/3/3A Connecting Rod Locking Tab Deformation Triumph 15
D connecting rod stamps Austin Healey 1
Csarneson Connecting Rod Bolt Question Austin Healey 3
H TR6 OEM Connecting Rod surprise Triumph 4
S T-Series connecting rod bolts MG 4
W connecting distributor wires Austin Healey 2
T TR2/3/3A ARP connecting rod bolts Triumph 2
B 1275 connecting rod nuts/bolts Spridgets 7
RedTR3 TR2/3/3A Connecting Rod Bolts Triumph 10
germanmichel BT7 shroud connecting at front frame rail plates Austin Healey 6
Sarastro T-Series TD connecting rod big end diameter MG 4
KLUTZ Easiest method for connecting Emerg. brake cable MG 5
J TR2/3/3A TR3 connecting rod bearing replacement Triumph 11
PatGalvin TR2/3/3A TR3 Connecting Rod Needed Triumph 10
J TR4/4A Tr 3a & TR4 - connecting rod bolt problems? Triumph 11
G MGB MGB Connecting pin MG 5
D Balancing Connecting Rods Triumph 17
Basil Connecting Rod Bolts Triumph 12
C Connecting Rods and Cams Lotus 1
KVH Wellseal and Connecting Rod Place Bolts Again Triumph 2
mjobrien Connecting Rods - Big end Dia Austin Healey 10
KVH Connecting Rod Bolts Triumph 11
G Can't remove the connecting rod bolts...HELP Triumph 6
J Connecting Rod Front and Back? Spridgets 7
2wrench Connecting rod bushing needs work Triumph 16
G TR 3/4 connecting rods Triumph 6
D connecting rod/piston compatibility Spridgets 2
drooartz Connecting ignition wires Spridgets 10
tr6web TR6 TR6 Wiper Motor Connecting Rod Triumph 2
Y Connecting rod Triumph 1
T TR6 tr6 connecting rods/motorcycle connecting rods Triumph 2
kodpkd Adjustable Tie Rods Austin Healey 20
6 Master Cylinder Actuator rods Spridgets 2
B RHD BJ8 Throttle Control Rods Austin Healey 9
B TR4/4A Outer tie rods Triumph 8
rr64 Wanted Early MGB Inner Steering Track Rods Wanted MG Classifieds 1
K TR2/3/3A New Tie rods and Ends Triumph 3
AH67AH Tie Rods / Alignment Austin Healey 3
I Wanted emergency brake rods from later Spridget Spridgets Classified 0
PAUL161 T-Series Bent Push Rods MG 34
S TR2/3/3A shifting tower shifting rods on an early tr3 tower Triumph 11
John Turney Alumifix Flux-cored Rods Restoration & Tools 4

Similar threads

Top